My guitar pedal makes a “pop” when I engage it.
This is normal. The reason this happens is because the capacitors in the circuit leak a little bit of DC while the pedal is in the bypassed state. When you engage the pedal, the capacitors charge back up to the proper operating voltage which is translated into a small “pop” in the audio signal. The pop may be louder or quieter depending on the quality of the capacitor or the nature of the effect (i.e. high gain pedals may have a louder “pop”).
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